Derek Willis (born June 21, 1995) is an American basketball player for Anadolu Efes of the Turkish Basketbol Süper Ligi and the EuroLeague.

Although born in Louisville, Kentucky, he lived with his family for several years during his childhood on the Wind River Indian Reservation in Wyoming.

Willis was the first player to commit to Kentucky's 2013–14 recruiting class,[2] choosing UK over Indiana, Louisville and Purdue.

[7] In his professional debut on November 3, 2017, he provided the game-winning tip-in in Grand Rapids' 86–85 victory over the Erie BayHawks.

[8] Making 43 G League appearances (38 starts) as a first-year player, Willis averaged 11.8 points and 6.9 rebounds per contest.